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Why is frequency modulation preferred over amplitude modulation for transmission of music?
FM provides noise immunity, whereas AM is easily affected by noise.
With FM, the amplitude of the sound is converted into a shift in frequency. So the volume is limited by the bandwidth, but the frequency of the sound can vary as much as it likes, giving a higher fidelity sound.
Spikes induced on the signal usually affect the amplitude of the signal. The amplitude of an FM signal is not used in the demodulation process and is therefore immune to spikes in the signal.
AM was first used in radio because it is very easy to achieve using basic components. A single rectifier only, is needed to recover the audio.
FM is quite a complicated process and could only be achieved once electronics had progressed.
What else can I help you with?
Why qam is better than other modulation?
Quadrature Amplitude Modulation (QAM) is often considered superior to other modulation schemes due to its ability to transmit multiple bits of data per symbol by combining amplitude and phase variations. This efficiency allows for higher data rates within the same bandwidth compared to traditional methods like Amplitude Modulation (AM) or Frequency Modulation (FM). Additionally, QAM can effectively combat noise and interference, making it suitable for high-capacity communication systems, such as digital television and broadband internet. Overall, its versatility and efficiency make QAM a preferred choice in modern digital communication.
Why is serial transmission preferred for long distances?
Because the costs are small than other kind of transmissions. For example, in case of 8 bits data transmission, parallel aprouch needs 8 wires but serial only 1 (cheapest).
What is the need for downconversion of the input frequency into intermediate IF frequency in RF receiver?
Your IF stages, normally three is a filter to give you better selectivity, it filters out all second channels and only let the preferred channel thru to your detector stage, the three stages is always tuned slightly off beat, in SW: 477KHz, 476KHz, 477KHz
What is the frequency limit of copper wire?
The frequency limit of copper wire is generally around 1 GHz for typical applications, but it can vary depending on factors such as wire diameter, insulation type, and the specific application. At higher frequencies, signal loss due to skin effect and dielectric losses increases, which can limit effective transmission. For specialized applications like RF and microwave communications, techniques such as using coaxial cables or twisted pairs can help mitigate these losses. However, for very high frequencies, alternatives like fiber optics are often preferred due to their superior performance.
Why resistive load inverter is not preferred?
Resistive load inverters are generally not preferred because they are inefficient for applications requiring variable loads, such as motors or other inductive devices. They produce a significant amount of heat due to energy loss in the form of resistive heating, which can reduce overall system efficiency and lifespan. Additionally, they offer limited control over the output voltage and frequency, making them less versatile for modern energy systems that demand precise power quality and management.
Why is FM preferred to am in satellite channels?
FM stands for frequency modulation and AM stands for Amplitude modulation. In FM, frequency of a modulating signal is modulated using carrier frequency i.e. more data can be transmitted using a little space and also it is safe to transmit the information while in AM amplitude of a modulating signal is modulated using carrier frequency i.e. more space needed for transmitting the information. That's why we use FM in place of AM
Why FM is preferred for audio signal transmission?
FM also known as frequency modulation is preferred because of the more concise ability to transfer quality sound at the expence of distance. Also FM is not as severely effected by weather as its lower frequency AM counterpart.
Why SSB is not suitable for video signal transmission?
Single Sideband (SSB) modulation is generally not suitable for video signal transmission due to its inherent complexity and the nature of video signals, which require a substantial bandwidth to accurately convey high-frequency details and rapid changes in luminance and chrominance. SSB is designed for efficient voice communication, where the bandwidth can be constrained, but video signals contain a wide range of frequencies and require continuous transmission of large amounts of data. Additionally, the SSB demodulation process can introduce delays and distortions that are unacceptable for real-time video applications. Hence, modulation schemes specifically tailored for higher bandwidth and quality, like amplitude modulation (AM) or frequency modulation (FM), are preferred for video transmission.
Why qam is better than other modulation?
Quadrature Amplitude Modulation (QAM) is often considered superior to other modulation schemes due to its ability to transmit multiple bits of data per symbol by combining amplitude and phase variations. This efficiency allows for higher data rates within the same bandwidth compared to traditional methods like Amplitude Modulation (AM) or Frequency Modulation (FM). Additionally, QAM can effectively combat noise and interference, making it suitable for high-capacity communication systems, such as digital television and broadband internet. Overall, its versatility and efficiency make QAM a preferred choice in modern digital communication.
What is positive and negative modulation?
in order to transmit the video signal amplitude modulation is used. the composite video signal has distinct polarity of black and white levels in the picture.1.positive modulation :- in this type of modulation, increase of brightness toward white causes increase in carrier amplitude peak white has 100% modulation while black and sync level have lower and minimum modulation respectively2.negative modulation :-in this type of modulation,the sync tip level are at 100%.blanking level correspond to black is at 75%and increase in brightness toward white causes decrease in carrier amplitudeNegative modulation is preferred over positive modulation because impulse interference is difficult to deal with and random increase in signal is similar to existing sync pulse.these interference result in generation of black spot and white blobs.
What is the meaning of AM and FM radio?
Amplitude modulation and frequency modulation. FM is a way of adjusting a signal for transmission by radio frequency to cut out the background radiation that can create static and a weak or damaged signal; AM is simply using one frequency and amplifying it only.
TTL logic is preferred to DRL logic?
TTL is faster and does not lose amplitude
Why is frequency modulation preferred for stereophonic broadcasting?
The FM band has three advantages, 1) Wider band width per channel, allows three components to be modulated on the carrier, the L+R, pilot and L-R channels. Also the band with extends to 15kHz where AM is limited to 5KHz. 2) FM is more efficient means of modulation. 3) Less susceptible to noise.
Why digital transmission is preferred than analog transmission?
Faster responce.
Why time period measurement is preferred at low frequency?
Frequency is measured in Hertz. Cycles per second.
Why the sky waves are not used in the transmission of T.V. signal?
when the frequency range is more than 40mhz then the ionosphere is totaly unable to reflect the signal back to the earth.as we know that the frequency range of TV signals is 100mhz-200mhz.so the transmission of TV signals via sky waves is not possible.
Why classb is preferred over class c modulation?
That depends on the use. Each has advantages in different applications. Without more specifics on your application I cannot comment usefully.
